My mother and I just finished a scrapbook for my niece, Lily. The book has a full year of calendar months plus her birthday (June-June). Each calendar page has a decorated page placed next to it where you can place pictures. We thought this would be an excellent way for her mommy to keep track of what happens each month.
I made my own calendar template in illustrator, though you could use a blank calendar from a craft store.
See my pictures below for examples of a few pages.